sour corrosion

1. n. [Well Completions]
Corrosion associated with the presence of hydrogen sulfide [H2S]. Sour corrosion occurs in several forms of hydrogen embrittlement that cause materials to fail at stress levels below their normal yield strength. This can be problematic in applications where higher strength steels are used. Selection of materials resistant to the effects of H2S is the primary means of controlling sour corrosion.
2. n. [Enhanced Oil Recovery]
The corrosion caused by contact with hydrogen sulfide [H2S] dissolved in water. Sour corrosion takes the form of sulfide stress cracking or hydrogen embrittlement.